如何设置system.io.stream对象以写入值 [英] How to sets the system.io.stream object for write a value

问题描述

我已经尝试了一天左右但是无法正常工作！



我想设置一个System.IO.Stream对象进一步使用！喜欢WebRequest.GetRequestStream（）



任何帮助都将不胜感激！



我有什么试过：



使用System;

使用System.Collections.Generic;

使用System .Collections.Specialized;

使用System.Text;

使用System.IO;



namespace Utility

{

内部类HttpRequest

{



private string url;

public byte [] header_bytes;



protected const string crLf =\\\\ n;



私有版_version = HttpVersion.Version11;



public NameValueCollection header

{

get;

set;

}



公共字符串方法

{br / >
get;

set;

}



public Version version

{

get {return _version; }

set {_version = value; }

}



公共HttpRequest（字符串网址）

{

this .url = url;

headers = new NameValueCollection（）;

}



public static HttpRequest create（ Uri uri）

{

var req = new HttpRequest（uri.PathAndQuery）;

req.headers [Host] = uri。 DnsSafeHost;



返回要求;

}



公共流get_stream（ ）

{

get_header_bytes（）;

返回新的MemoryStream（header_bytes）;

}



public HttpResponse get_response（Stream stream）

{

if（header_bytes == null）get_header_bytes（）;

stream.Write（header_bytes，0，header_bytes.Length）;



返回HttpResponse.read（流）;

}



private void get_header_bytes（）

{

var header = new StringBuilder（）;

header.AppendFormat（{0} {1} HTTP / {2} {3}，方法，网址，版本，crLf）;



foreach（header.AllKeys中的var键）

header.AppendFormat（{0} ：{1} {2}，key，headers [key]，crLf）;



header.AppendLine（）;

header_bytes = Encoding.UTF8.GetBytes（header.ToString（））;

}



}

}



我想做的是



var post_data = Encoding.UTF8.GetBytes（name = value ）;



var request = HttpRequest.create（new Uri（url））;

request.method = verb.ToString（） ;



使用（var ss = request。 get_stream（））

ss.Write（post_data，0，post_data.Length）;



我无法附加ss（流）有更多数据：（

I've been tried doing for a day or so but can't make it work !

I want to set an System.IO.Stream object for further usage ! like WebRequest.GetRequestStream()

any help would be appreciated !

What I have tried:

using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Text;
using System.IO;

namespace Utility
{
internal class HttpRequest
{

private string url;
public byte[] header_bytes;

protected const string crLf = "\r\n";

private Version _version = HttpVersion.Version11;

public NameValueCollection headers
{
get;
set;
}

public string method
{
get;
set;
}

public Version version
{
get { return _version; }
set { _version = value; }
}

public HttpRequest ( string url )
{
this.url = url;
headers = new NameValueCollection ();
}

public static HttpRequest create ( Uri uri )
{
var req = new HttpRequest (uri.PathAndQuery);
req.headers ["Host"] = uri.DnsSafeHost;

return req;
}

public Stream get_stream ()
{
get_header_bytes ();
return new MemoryStream(header_bytes);
}

public HttpResponse get_response ( Stream stream )
{
if ( header_bytes == null ) get_header_bytes ();
stream.Write (header_bytes , 0 , header_bytes.Length);

return HttpResponse.read (stream);
}

private void get_header_bytes ()
{
var header = new StringBuilder ();
header.AppendFormat ("{0} {1} HTTP/{2}{3}" , method , url , version , crLf);

foreach ( var key in headers.AllKeys )
header.AppendFormat ("{0}: {1}{2}" , key , headers [key] , crLf);

header.AppendLine ();
header_bytes = Encoding.UTF8.GetBytes (header.ToString ());
}

}
}

What i want to do is

var post_data = Encoding.UTF8.GetBytes("name=value");

var request = HttpRequest.create (new Uri (url));
request.method = verb.ToString ();

using ( var ss = request.get_stream () )
ss.Write (post_data , 0 , post_data.Length);

I can't append the ss (Stream) with more data :(

推荐答案

当你创建一个新的 MemoryStream 传入一个 byte 数组，该流的容量限制为您传入的字节数组的大小。

When you create a new MemoryStream passing in a byte array, the capacity of that stream is limited to the size of the byte array you pass in.

MemoryStream构造函数（字节[]） [< a href =https://msdn.microsoft.com/en-us/library/e55f3s5k%28v=vs.110%29.aspxtarget =_ blanktitle =New Window> ^ ] ：

根据指定的字节数组初始化MemoryStream类的新不可调整大小的实例。

Initializes a new non-resizable instance of the MemoryStream class based on the specified byte array.

您需要使用默认构造函数或指定初始容量的构造函数：

You need to use the default constructor, or the constructor that specifies the initial capacity:

var result = new MemoryStream(header_bytes.Length);
result.Write(header_bytes, 0, header_bytes.Length);
return result;

然后，您就可以向流中写入额外的字节。

You'll then be able to write additional bytes to the stream.

var temp_bytes = header_bytes;

          header_bytes = new byte [1024];

          var ret = new MemoryStream (header_bytes , 0 , 1024 , true);
          ret.Write (temp_bytes , 0 , temp_bytes.Length);
          return ret;

我终于找到了它！谢谢

I finally found it myself ! thank you

Richard Deeming

我深入了解内存流并找到解决方案！非常感谢

i dig deep into memorystream and found the solution ! really appreciated

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